844 Wheel Dozer

844 Wheel Dozer

Cat Wheel Dozers are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a lower cost per ton. Engineered for your demanding work in large dozing applications, the 844 Wheel Dozer is the largest in the Cat Wheel Dozer line and is an ideal match for large mining operations, power generating utilities, the general contracting industry and wherever mobility, versatility and compaction is needed.

  • Engine Model C27 Cat®

  • Rated Speed 1800 r/min

  • Gross Power - ISO 14396 752 hp

  • Gross Power - SAE J1995 766 hp

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Product Specifications

Specifications

Engine

  • Bore 5.4in

  • Displacement 1649.5in³

  • Emissions U.S. EPA Tier 4 Final and EU Stage V or China Nonroad Stage III Emissions standards, equivalent to U.S. EPA Tier 2

  • Engine Model C27 Cat®

  • Gross Power - ISO 14396 752hp

  • Gross Power - SAE J1995 766hp

  • Net Power - SAE J1349 - High Ambient 648hp

  • Net Power - SAE J1349 - Standard Ambient 699hp

  • Peak Torque - Speed 2624lb/ft

  • Rated Speed 1800r/min

  • Stroke 6in

  • Torque Rise 18%

Operating Specifications

  • Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3)

  • Operating Weight 165089lb

Transmission

  • Converter Drive - Forward 1 4.5mile/h

  • Converter Drive - Forward 2 8.3mile/h

  • Converter Drive - Forward 3 14.2mile/h

  • Converter Drive - Reverse 1 4.9mile/h

  • Converter Drive - Reverse 2 9.1mile/h

  • Converter Drive - Reverse 3 15.5mile/h

  • Direct Drive - Forward 1 Lock-up disabled

  • Direct Drive - Forward 2 8.5mile/h

  • Direct Drive - Forward 3 15.2mile/h

  • Direct Drive - Reverse 1 5.4mile/h

  • Direct Drive - Reverse 2 9.6mile/h

  • Direct Drive - Reverse 3 16.4mile/h

  • Transmission Type Cat Planetary Power Shift

Hydraulic System - Lift/Tilt

  • Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in)

  • Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in)

  • Output at 2,000 rpm and 6900 kPa (1,000 psi) 82gal/min

  • Relief Valve Setting - Bulldozer (Large Pump) 2700psi

  • Relief Valve Setting - Tilt Cylinders (Small Pump) 2920psi

Hydraulic System - Steering

  • Maximum Flow 94.3gal/min

  • Minimum Turning Radius - Over Blade 34ft

  • Relief Valve Setting 4500psi

  • Steering System - Circuit Pilot, load sensing

  • Steering System - Pump Piston, variable displacement

  • Total Steering Angle 35°

Service Refill Capacities

  • Cooling System 54.9gal (US)

  • Crankcase 20gal (US)

  • Differential - Final Drives - Front 71.6gal (US)

  • Differential - Final Drives - Rear 68.9gal (US)

  • Fuel Tank - Standard 286.6gal (US)

  • Hydraulic System - Implement and Hydraulic Fan 68.9gal (US)

  • Hydraulic System - Steering and Braking 34.9gal (US)

  • Transmission 29.1gal (US)

Air Conditioning System

  • Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

Axles

  • Front Fixed

  • Oscillation Angle 8.5°

  • Rear Trunnion

Brakes

  • Brakes Meets ISO 3540:2011

Sound Performance - Standard

  • Machine Sound Level (ISO 6395:2008) 115dB(A)

  • Operator Sound Level (ISO 6396:2008) 69dB(A)

Sound Performance - Suppression

  • Machine Sound Level (ISO 6395:2008) 113dB(A)

  • Operator Sound Level (ISO 6396:2008) 69dB(A)

Cab

  • ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards

Dimensions (Approximate)

  • Centerline of Front Axle to Hitch 7.5ft

  • Centerline of Rear Axle to Edge of Bumper 12.5ft

  • Ground Clearance 2ft

  • Height - Top of Exhaust Pipe 16.6ft

  • Height - Top of Hood 12.7ft

  • Height - Top of ROPS 17.2ft

  • Length - With Blade on Ground 36.5ft

  • Wheel Base 15.1ft

Features

Equipment

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.

  • Air conditioner and heater with automatic temperature control

  • Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)

  • 12V power port for mobile phone or laptop connection

  • Cigar lighter and ashtray

  • Coat hook

  • Electro-hydraulic blade controls (joystick)

  • Flip-up armrest

  • Heater and defroster

  • Horn, electric

  • Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature

  • Instrumentation, warning indicators: - Action alert system, three category - Automatic transmission model enable status - Brake malfunction - Bucket float status - Delayed engine shutdown status - Engine idle shutdown status - Engine malfunction - Fuel economy mode enable status - Hydraulic lockout - Lockup clutch enable status - Low fuel level - Parking brake status - Rimpull control enable status - Seatbelt warning - Secondary steering (if equipped) - Throttle lock status - Transmission gear

  • Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock

  • Light, dome (cab)

  • Lunchbox and beverage holders

  • Mirrors, rearview (externally mounted)

  • Seat, premium with heated and actively cooled leather, adjustable lumbar support, air adjustable bolsters on the seat and backrest, seat cushion tilt adjustment, and adjustable-length seat cushion

  • STIC control system with steering lock

  • Tinted glass

  • Wet-arm wipers/washers (front, rear and corner) intermittent front wiper

  • Converter (12V, 10/15 amp) and power port

  • Brakes, oil cooled, multi-disc, service/secondary

  • Axle-shaft oil-disc service brake

  • Electro hydraulic parking brake

  • Cat clean emission module (Tier 4 only)

  • Demand fan

  • Engine Cat C27

  • Fuel priming pump (electric)

  • Ground level engine shutoff

  • Mufflers (under hood) (Tier 2 only)

  • Precleaner, engine air intake

  • Radiator, Aluminum Modular (AMR)

  • Separated cooling system

  • Starting aid, (ether) automatic

  • Throttle Lock electronic

  • Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system

  • Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)

  • Alternator, 150 amp

  • Batteries, maintenance free (4 - 1,400 CCA)

  • Deutsch terminal connectors

  • Electrical system, 24V

  • Electronic transmission control

  • Lighting system, halogen (front and rear) lighting, access stairway, engine compartment

  • Starting and charging system, 24V

  • Starter lockout in bumper

  • Starting receptacle for emergency start

  • Transmission lockout in bumper

  • Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles

  • Case drain filters

  • Coupling, Caterpillar O-ring face seals

  • Guards, crankcase and power train

  • Hitch, drawbar with pin

  • Hoses, Cat XT

  • Oil sampling valves

  • Product Link

  • Camera, rear vision

  • Implement lockout switch

  • Seat belt, retractable, 76 mm (3 in) wide

  • Trainer seat with lap belt

  • Alarm, back-up

  • Emergency platform egress

  • Stairway, left and right rear access

  • Steering, secondary

  • Toe kicks

  • Fenders, steel (front)

  • Axle temperature sensor

  • Battery disconnect and jump start receptacle, bumper

  • Economy mode with on demand throttle

  • Engine, crankcase, 500 hour interval with CH4

  • Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown

  • Grouped/labeled lube points

  • Positive flow control hydraulic system

  • Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission

  • Steering, load sensing

  • Vandalism protection caplocks

  • Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)

Optional Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.

  • 50° C (-58° F) antifreeze

  • Engine oil change system, high speed, Wiggins

  • Engine block heater 120V or 240V

  • High ambient cooling - software

  • Semi-U - 17.8 m3 (23.3 yd3)

  • HD Semi-U - 16.1 m3 (21.1 yd3)

  • Coal - 30.7 m3 (40.2 yd3)

  • Cab precleaner

  • AM/FM/MP3 radio

  • Satellite Sirius radio with Bluetooth

  • LED warning strobe

  • CB radio ready

  • Window sun shade

  • Front and rear roading fenders

  • Fast fill fuel system (Shaw-Aero)

  • Axle oscillation stop

  • Paint, black blade rear

  • Venturi stack